Doorcheck



Aug. 4, 1925. l,548,50l

H. A. ARNOLD DOORCHECK Filed Feb. 23, 1924 2 Sheets-Sheet 2 @i 7 "1 m9enten Patented Aug. 4, 1925.

UNITED STATES .PATENT OFFICE.

Application led February 23, 1924. Serial No. 694,627.

To all whom'z't may concer/n.'

Be it known that I, HAROLD A. AnNoLD, a citizen of the United States,residing at Lenora, in the county of Norton and State p liquid chec thatwill occupy but little space so that it can be casilymounted between themain door and the screen door.

-It has for further objects to provide a check of this nature that shallbe simple, composed of few parts, those capable of manufacture at smallcost, readilyassembled and adjusted, not liable to get out of order, yetreliable and eiiicient in use.

My present improvement .comprises broadly a wing piston, semi-circular1n shape, with a casing having a'semi-clrcular channel in which saidpiston oscillates, the said casing having two chambers with a partitiontherebetween, a check valve, and a slidably mounted piston, withprovision for the iiow of aliquid from the one chamber into the other.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined lby theappended claims.

The invention, in its preferred form, is clearly illustrated in theaccompanying drawings, which, with the numerals of reference markedthereon, form a part of this specification, and in which Figure 1 is atop plan, with portions in section and parts broken away, showing thecheck attached to the screen door, between the latter and the main door,the screen door being in its closed position.

Figure 2 is a side elevation of the parts seen in Figure 1, with themain door removed. v

Figure 3 is an enlarged elevation of the check casing, with the endclosure removed, and the central shaft and the securing means for oneend of the spring shown in cross section, the section being taken as onthe line 3-3 of Figure 2, looking in the direction of the arrows.

Figure 4 is a section on the line 4-4 0f AFigure 1, looking= in thedirection of the arrows. Figure 5 is a section on the line 5-5 of Figure2,.-looking in the direction of the arrows.; f

Figure 6 is an elevation of the semi-circular piston removed.

Figure 7 is an enlarged section4 through the sector with its ball valveguide or cage, with the ball valve in elevation.

Like numerals of reference indicate like parts throughout the severalviews.

Referring to the drawings '1 designates the door-frame, a portion 2 ofthe main door only being shown, while 3 designates the screen door, orother movable member-hinged at 4 to the door frame, as seen clearly inFigure 1.

The attachment and operation of my improved check will be substantiallythe same no matter whether it be attached to a door, or any other hingedor movable member in connection with which it is desired that it shallserve. Its connection to a screen door as in the present instance isgiven merely as an illustration of the relative disposition of the checkwith reference to the movable and relatively fixed parts, in the presentinstance showing how the check can be readily disposed between the mainand screen doors.

Attached to the door frame 1 is a bracket 5 of any suitable characterand secured in any suitable manner, the bracket in the present instancebeing shown as of angular form, one portion of which engages and issecured to the door frame, while to the other member 6 is pivoted as at7 one end of the lever 8, to the other end of which is pivoted as at 9the lever l0, the other end of which is pivotally mounted as at 11 inthe forked or bifurcated lever 12, the side walls of which are providedwith a plurality of holes 13, providing for such adjustment of the checkas may be necessary or advisable. The lever 10 works in the slot 14 ofthe said lever 12 as will lbe readily understood from reference toFigure 2.

The other end of the lever 12 is connected with the outer end of theshaft 15 by means l of pin 16 or the like, as will be seen in Figure 4.

The check is shown as secured to the door by means of screws or the like17 passed through holes 18 in the base portion 19 of the check.

The check may be mounted at the top of a door, or on the middle crossbar of the door as may be desired.

The shaft l is rotatably mounted in the body o1' casing member 20 and ina. bearing or bushing 21 held in the cover member. 22 of the check,screws or the like 23 passlng through holes 24 in the body portion andcorresponding holes in thecover serving to hold these two parts inposition and allowing ready access to the interior of the check whendesired.

25 is a connecting washer having a right angled projection 26, thiswasher being received within a depression in the bottom of the bodyportion of the check and secured to the shaft 15 near the inner end ofthe latter in any suitable manner as by pin or the like 27 as seen inFigure 3 to engage the dog 29 secured in any manner as by screwto oneend of the semi-circular piston 31 movable in 4the circular groove orchannel 32 formed in the body portion of the check as seen in Figures 3and/5.

33 is a spring encircling the shaft 15 with one end engaged with a .pinor lug or the like 34 within/ the cover 22 as seen best in Figure 4, andthe other end of this spring is turned at an angle as seen at 35 andengaged with the edge of the member 25 as seen best in Figure 3. i y Themember 20 has two chambers, 36 and 37, formed by the partition 38 whichis of greater height for substantially one half its circumference thanforv the other half, 39, see Figures 3, 4 and 5 being shorter, orportion of less height.

40 are passages drilled or otherwise formed in the wall of the memberand extended through the partition 38 as seen in Figure 3 andcommunicating with the chamber 36. 41 are vertical passages, or passagesat substantially right angles to the passages 40 and communicating withthe channel 32 beneath the piston 21 as seen vby dotted lines in Figures4 and 5. The capacity of these passages is regulated by suitable meansas the screws 42, see Figure 3 adjustable in the passages 40.

43 is a sector disposed in the channel 32 asshown best in Figure 3. Itmay be secured in position in any convenient manner; in Figure 3 it isshown as secured by the pins 44 which are engaged in openings formedpartly in the partition 39 and partly as at 45 in the sector. The upperwall of this sector is formed with an opening 46 pro viding a seat for aball check valve 47 as seen clearly in Figures 3 and 7. This sector hasalso a guide or cage 48 seen best in Figure 7 to protect and guide theball valve, this guide or cage finding a seat in an opening 49 in theend of the piston 31 as seen in Figure 3 in dotted lines, the seat oropening 49 being seen clearly in Figure 6.

52 is a guard on the door frame against which will rest the lever 8 whenthe screen door is swung open against the wall of the house.

Vith the parts constructed and arranged substantially as above describedthe opera-.

tion will be readily understood, and briefly stated, is as follows;-

supposing the door to be closed, upon opening the door the check, movingwith the door and away from the casing or frame, moves the pivot end ofthe lever 12, thus rotating the shaft 15 which rotates the connectinfrWasher 31 through the connections herein efore described, thusincreasing the tension of the spring 33 which is adapted to move thesaid washer in the opposite direction and through the means of theshaft, levers and connections close the door. The bushing with itspacking 51 forms a tight bearing for the shaft and between the cover andbearing so as to allow no oil to leak out between the bearing and shaftin the o ration of the door. It is to be understoo that oil is placed inthe chambers of the check, and is allowed to iiow in and out of thechannel 31 in the actuation of the door, the flow of the oil beingregulated by means of the screws 42 in a manner wh1ch will be readilyunderstood. Thus when the door is closed the semi-circular piston isclose to the sector 43, itbeing understood that when the cover isfastened in osition on the body of the check the channe 31 is closed onthe sides, top and bottom except for the hole-s 41 as the cover fitstight on the rims of the body portion. lVhen the door is opened thepiston is moved away from the sector through the dog, the shaft 15 andthe lever 12. The valve in the sector lets the oil in the check ontheother side of the sector flow into the space occupied by the piston.The coiled spring pulls the piston and door back to their originalposition, but the piston and hence the door cannot move back intoposition any faster than the oil can escape from between the piston andthe sector. The check valve will not let the oil through the sector sothat the oil can only escape slowly through the openings 41, this allowsrapid closing on the initial movement but causes a gradual constrainingof the motion as the door closes. The rapidity of the escape of the oilfrom the chamber between the piston and sector can be easily regulatedby set screw 42 in the passage 40 which will regulate the size of theopening 41 and in this way the motion of the piston and the door may beregulated as may be desired.

One of the most important advantages of my improved form of check isthat while in the ordinary form with wing type piston there is muchtrouble due to oil leakage. 13

This trouble is entirely obviated in my form of check. When the door iswide open it may close quickly and leakage is no disadvantage, but whenthe door is nearly opencd its motion should be checked. It is then Ithatthe oil is likely to leak past the wing piston and casing of theordinary wing type. Such is not the case with my construction, and theleakage is entirely. prevented due to the surface contact between thecasing and piston which is so greatly increased when the piston slidesinto the sleeve due to the closing motion of the door, and there islittle chance of oil leaking between the piston and casing. This type ofpiston has more surface contact with the casing and thus reduces oilleakage past the piston.

Furthermore, in my construction the checking member is removed'away fromthe shaft which increases the leverage of the wing piston for thechecking member, making it more effective, reduces troubles due toleakage, and makes the check more compact in that it allows room for thespring near the shaft and between the shaft and the piston, making itunnecessary to have an extra chamber above the check for the spring.

Modifications in detail may be resorted to without departing from thespirit of the invention or sacrificing any of its advantages.

4What is claimed as new is .1. A check comprising a casing havitwochambers of different heights, a shaft rotatably mounted therein,said chambers being communicating a coiled spring and a leverconnectedto said shaft, and an oscillatory checking member in said casing.

2. A check comprising a casing havin two chambers` of different heights,a shaft rotatablymounted therein, said chambers being communicating acoiled spring and a lever connected to said shaft, an oscillatorychecking member in said casing, and means for regulating the movement ofsaid checking member.

3. A check comprising a casing having two chambers of different heights,a shaft rotatably mounted therein, said chambers being communicating alever connected with said shaft, and carrying means for connection witha door frame, and an oscillatory piston movable in said casing andactuated by said shaft.

4. A check comprising a casing having two chambers of different heights,a shaft rotatably mounted therein, said chambers being communicating alever connected with said shaft and carrying means for connection with adoor frame, and an oscillatory piston movable in said casing andactuated by said shaft, said casing having a circular channel in whichsaid piston moves.

5. A check comprising a casing, having two chambers of differentheights, a shaft rotatably mounted therein, said chambers beingcommunicating a lever connected wit said shaft, and carrying means forconnection with a door frame, an oscillatory piston movable in saidcasing and actuated by said shaft, said casing having a channel 1n whichsaid piston moves, and Huid-control lmeans cooperable -with saidpiston';

6. A check comprising a casing having two chambers of different heightsand having an annular channel, a shaft rotatably mounted in said casingand carrying a rotatable member, said chambers being icommunicating apiston insaid channel actuated by said member, and means for actuatingsaid member from said shaft.

7. A check comprising a casing with two chambers of different heightsand an annular channel, a shaft rotatably mounted inv said casing, meanscarried by said lshaft for attachment to a door frame said chambersbeing communicating an oscillatory piston movable in said channel, meanswhereby said piston is lactuated by connection with said shaft, and aspring controlled by the movement of the said shaft.

8. A casing having two chambers of different heights, a shaft rotatablymounted in said casing. said casing having a circular channel, saidchambers being communicating a semi-circular. piston movable in saidchannel and connected with said shaft, and

g a check' valve mounted in said channel.

9. A casing having two chambers of different height-s and having anannular channel, a shaft rotatably mounted in said casing. a check valvelocated in said casing, a spring connected with the said shaft, saidchambers g being communicating a semi-circular piston movable in saidchannel and actuated from said shaft, and means for regulating themovement of said piston.

l0. In a door check` a casing chambers of different heights. a shaftrotatably mounted therein, said chambers being communicating anoscillatory piston in said casing, and cooperating means forming aconnection between said shaft and piston.

11. In a door check, a casing having two chambers of different heights,a wing piston therein actuated by but removed from the shaft of thecheck, said chambers being communicating and a spring interposed betweensaid shaft and the piston.

12. In a door check. a casing, a wing piston therein actuated by butremoved fro-m the shaft of the check, and a spring interposed betweenthe said shaft and piston, the casing having two chambers concentric,and communicating, and the spring arranged in one chamber and the pistonin the other.

13. A door check comprising a casing having two chambers of differentheights, a rotatable shaft mounted in one of said chamhaving twomovement in the other a semi-circular piston mounted for chamber, saidchambers being communicating and means for actuating said piston fromsaid shaft.

14. A door check comprising a casing havin two chambers of different heihts, said c iambers being communicating a c eck valve in one chamber, asemi-circular piston in the other chamber, said valve and piston beingarranged at the openings into said chambers.

15. A door check comprising a casing with two chambers of differentheights, a partition between the-chambers, embodying a semi-circularflange with a check val-ve at one end of the flange, said chambers beingcommunicating, and a piston slidably mounted at the other end of saidflange.

16. A door check comprising a casing bers,

Ahaving two chambers of dii'erent heights, a

partitlon between the two chambers, said i chambers being communicatinga check valve `at one end of the one chamber., a plston slidable uponthe other end of the flange, a shaft rotatably mounted in the otherchamber, and a sprlng in the last-named chamber and connected with saidshaft.

17. A door check comprising a casing, a shaft rotatably mounted therein,a piston connected lto the sha-ft to be actuated thereby,

,a-sleeve within which said piston is slidably disposed, a check valvein said sleeve, controlling vthe passage from said sleevgl to anotherchamber in said casing to allow oil in said casing to flow from onechamber to another, the piston being connected so as to move into thesleeve when the door is closing, the oil in the sleeve serving toregulate the movement of said piston, and means whereby the surfacecontact increases or decreases according to the direction of movement ofthe piston. f

18. A casing, a sleeve therein, a shaft rotatably mounted in saidcasing, a spring connected to said shaft, a piston connected to saidshaft to be actuated thereby, said piston being slidably disposed insaid sleeve a check valve insaid sleeve, controlling the passage fromsaid sleeve to another chamber 1n said casing to allov oil in saidcasing to f flow from one chamber to another, said piston beingconnected to move into the sleeve when the shaft is rotated in onedirection, the oil in the sleeve serving to regulate the movement ofsaid piston, and means whereby i the surface contact increases 0rdecreases according to the direction of movement of the piston.

19. A door check comprising a casing having two communicating chambersof dif- \-.ferent heights with a plurality of openings other of saidchambers.

20. In a door check, a casing, a sleeve therein, a shaft rotatablymounted in the casing, a spring connected to said shaft, a pistonconnected to the shaft to be actuated thereb said piston being slidablymounted in sai sleeve, a check valve connected with the sle ve, achamber in the casing, the passage o oil from which to another chamberis controlled by said valve, said chambers` being communicatin and ofdifferent heights said piston being connected to move into the sleevewhen the shaft is rotated in one direction, the oil in the sleeveserving to regulate the movement of the piston,

ture.

HAROLD A. ARNOLD.

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